D/HD transition in photon-dominated regions

Details D/HD transition in photon-dominated regions D/HD transition in photon-dominated regions

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..747r&link_type=abstract

The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 747

Physics

1

Interstellar Medium, Interstellar Molecules, Deuterium

Scientific paper

We consider the various formation/destruction and excitation processes associated to the deuterated hydrogen molecule in photon-dominated regions. The geometry of the cloud is assumed to be plane-parallel with an ultraviolet (UV) field impinging on one side of the cloud. The rotational equilibrium of the HD molecule is then obtained as a function of the visual extinction for various densities and values of the ultraviolet interstellar radiation field (ISRF). Prediction of the submillimeter rotational lines of HD is given.

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